You need to find a SIMPLE clean diet, that will stabalize you nutrionally, dont worry about weight, you wont go into remission right away, remember its take years and years and years for us to become sick, its not going to fix itself over night no matter what we do.
I take medicines, I take supplements, and I try to eat the purist and cleanest and most simple diet. and it has proved to do best for me so far.. just stick to what your doing, I dont think you need to waist money on a nutrionist, she is probably trained in mainsteam diets, she doesnt suffer from IBD ( I imagine) she will tell you to mix it up Im sure..
If I were you, I would not ask her for advice, but I would tell her what you WANT to do, tell her you want a simple, dominantly vegan/vegetarian diet, if I were you, I would try to include a little steamed fish. mostly veggie and fruits tho.. but simple veggies, nothing crazy, try just romaine lettuce.